Vulnerability CVE-2018-7502
Published: 2018-03-23

Description:
Kernel drivers in Beckhoff TwinCAT 3.1 Build 4022.4, TwinCAT 2.11 R3 2259, and TwinCAT 3.1 lack proper validation of user-supplied pointer values. An attacker who is able to execute code on the target may be able to exploit this vulnerability to obtain SYSTEM privileges.

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:L/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.2/10
10/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Beckhoff -> Twincat 
Beckhoff -> Twincat c++ 

 References:
http://www.securityfocus.com/bid/103487
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2018-001.pdf
https://ics-cert.us-cert.gov/advisories/ICSA-18-081-02
https://srcincite.io/advisories/src-2018-0007/
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